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1.31ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG500151220

Shape and cutting style on the report: Round brilliant

Certificate IGI LG500151220

Diamond specifications and retailer prices

From $793 SGD
As of November 5, 2026
Save $3,074 SGD (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,867 SGD at MOH London · As of November 5, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG500151220 or 500151220. Listed at 11 retailers as of November 5, 2026, with prices from $793 to $3,867, a $3,074 spread on the same certified stone. MOH London lists it at $3,867. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.31
Carat
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500151220
Dimensions6.94 × 6.97 × 4.34 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.94 mm6.97 mm1.31 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500151220
Side View
Table 56.5%Crown 36°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $3,867 SGD|Low: $761 SGD|High: $3,924 SGD|Avg: $1,557 SGD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 5$793 SGD
Retailer 8$889 SGD
Retailer 2$958 SGD
Retailer 6$984 SGD
Retailer 9$984 SGD
Retailer 3$1,150 SGD
Retailer 7$1,506 SGD
Retailer 10$1,552 SGD
Retailer 4$2,442 SGD
MOH London$3,867 SGD

22 data points across 10 retailers

11 retailers$793 SGD to $3,867 SGD

A
Cheapest Retailer
-
$793 SGD
B+
Retailer 2
-
$889 SGD
View
B+
Retailer 3
-
$889 SGD
View
Final sale: no returns
B+
Retailer 4
-
$958 SGD
View
Retailer 5
-
$984 SGD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$984 SGD
View
B+
Retailer 7
-
$1,150 SGD
View
B
Retailer 8
-
$1,506 SGD
View
B
Retailer 9
-
$2,442 SGD
View
B
Retailer 10
-
$2,588 SGD
View
Most Expensive
B
MOH London
LG500151220 · Nov 5
$3,867 SGD
£2,384 GBP
View
10 more retailers have this diamond
Prices start from $793 SGDSave up to $3,074 SGD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.31ct Round
$793 SGD